Aloha,
When I was selected to be a Chief Petty Officer I had a Chief order me to have any and all digital avatars changed to this:
As I was in much better shape (pre-back/neck/knee/shoulder injuries). I was a gym rat and worked out 2-3 hours a day every day, kept a clean shaven head and smoked a pipe.... And when you are going through "Chiefs season" when a Chief gives you orders.... you well, follow them!
And this one just stuck for me and ever since then, it has been my avatar. I have used some sort of rendition of this image throughout my various gaming profiles since.
Mahalo,
-Hapa